(Business interview) describes the startup process Linux system?

A brief description (verbal):

1. BIOS Power On Self Test (to check the hardware, cpu, motherboard, memory ......)

 

2. MBR boot

    446byte front cylinder 0 track 0 of the disk sector 1

3. grub boot menu

 cat/etc/grub.conf

4. load the kernel kernel

 

5. Start init process

 

6. Read inittab file, execute rc.sysinit, rc scripts, etc.

 

 

Graphic detail:

(Time and he is painting a piece, not someone else's)

 

 

 

 

 

 

Attach a centos7 systemctl command usage